Yarn-impinging detector controlled by active shuttle



Nov. 29, 1927. I 1,651,108

W. H. WAKEFIELD YARN IMPINGING DETECTOR CONTROLLED BY ACTIVE SHUTTLE Filed March 19, 1925 2 $heets-5het l IHVENTCR 1- WALTER H. WAKEFIELD HTTORN 2 5 Nov. 29, 1927. 1,651,108

W. H. WAKEFIELD YARN IMPINGING DETECTOR CONTROLLED BY ACTIVE SHUTTLE Filed March 19, 1925 2 Sheets-Sheet 2 T If g 4; {7/7/1- -"z 44 :il Q 63 5g 1 76 E i: v i E1 1| 2 ii- E1 61 A 4 Q [I 1| 2:- i: ii 4a "TE: 'i 1 "I 46 1 J; o 4\7 1 62 z; 6 7,3 7 4a 7 e9 66 7f 5 m 74 $5 INVENTOEZ- Y V WALTER H.WAKEFIE\ 'D Patented Nov. 29, 192.7.

untrue s'ralres 2,651,128 PATENT QFFICE.

WALTER H. WAKEFIELD, (BF VIORCESTER, MASSACHUSETTS, .ASSIGNOR TO CRUMPTOIET & KNOWLES LOOM WORKS. OF WORCESTER. BIASSAQHUSETTS, A GORPORATIGN OF MASSACHUSETTS.

YARN-IMPINGING DETECTOR CGNTROEJIIED BY ACTIVE SHUTTLE.

Application filed March 19, 1925.

This invention relates to weft detecting mechanism for looms operating with a plurality of shuttles, and more particularly to that type of detector employing a yarn impinging and a yarn penetrating member, relative movement of the two members being depended upon to give an indicationof substantial weft exhaustion to effect a change in the operation of the loom.

Detectors of the type specified can usually be adjusted so as to leave any desired amount of waste on the bobbin when substantial exhaustion is indicated but where such a detector operates with shuttles provided with very fine and also very coarse filling a setting which would leave a permissible amount of coarse yarn would leave too much of the fine yarn. It is accordingly the principal object of my present invention to provide a detector of the yarn impinging and penetrating type arranged to have varying degrees of sensitiveness depending upon which shuttle is active.

It is a further object of my invention to provide improved mechanism to control the detecting mechanism to the end that the latter may be moved positively from one position to another.

It is a still further object of my invention to provide a detector wherein the detecting surfaces are entirely independent of the control which determines the sensitiveness of the detector, the variation in sensitiveness being accomplished by operating on some part of the mechanism other than the yarn contacting portions.

It is a still further object of my invention to provide a shuttle box mechanism with a plurality of interchangeable devices for positively actuating the devices which control the sensitiveness of the detector, said mechanism being adjustable on the box mechanism and permitting the shuttles to be used in any desired order, the degrees of sensitiveness not necessarily being limited to the number of shuttles which can be moved to active position.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter d and. set forth in the claims.

re accompanying drawings wherein have shown form of my invention,

Serial No. 16,781.

Fig. 1 is a front elevation of a portion of a loom having my invention applied thereto Fig. 2 is an enlarged front elevation of the lower portion of the box rod and the mechanism associated therewith,

' Fig. 3 is a section taken on line 33 of Fig.2,

Fig. 4 is a'front elevation of the detecting mechanism,

Fig. 5 is a top plan view of the mechanism shown in Fig. 4E, and

Fig. 6 is a vertical section taken on line 6 -6 of Fig. 5.

In carrying out my invention I provide a loom frame 10 having at one end a plurality of shuttle boxes indicated at 11 which are mounted on box rod 12 moved vertically in any approved manner by mechanism not shown. Rocker shaft 13, journaledin the lower portion of frame 10, has secured thereto a rocker foot 14, see Fig. '2, having an upstanding arm 15 through which passes the lower end of the box rod 12. Said picker foot is further provided with a pin 16 on whichthe picker stick 1? may be mounted.

A control block 18 is adjustably secured to the rod 12 by means of set screw 19 and is provided with a groove 20 extending substantially parallel to the rod 12 along the forward face thereof. There are mounted on block 18 aplurality of control units 21, 22, 23, and 24, the arrangement shown herein calling for units 21 and 24 to be of similar construction and having therein a straight groove 25 and the units 22 and 23 being of similar construction and provided with cam grooves 26. The grooves are so formed that when the units are in position a substantially smooth slot is formed. In order to align the units each of the latter is provided with a rib 27 which fits into the groove 20-and each unit is further provided with a retaining screw 28 by means of which it is secured to the block 18.

Extending from the upstanding arm 15 is a stand 29 from which extends forwardly a stud 30 on which is pivotally. mounted vertical lever 31. The upper end of said lever 31 is provided with a stud 32'which is positioned to extend into the slots formed in'the units and the lower end of said lever is connected as at 38 to a'rod 34 extending under the loom. The rod extends to the opposite side of the loom and connected as at to a lever 36 pivotally mounted as at 37 to a fixed part of the loom.

The mechanism which is controlled by rod 34 is indicated in Figs. 4, 5, and 6. Said mechanism comprises an upright rod 38 connected at the lower end thereof to lever 36 as at 39. The rod 38 has a rod head 40 on the lower end thereof to permit vertical adjustment and the upper end of the rod is connected pivotally to the lower end of a slide block 41 moving in upper and lower guides 42 and 43, respectively, see Figs. 4 and 5. The guides are formed integrally with a stand 44 secured to the loom frame 10 and are provided with caps 45 to retain the block 41.

On the upper end of block 41 is pivotally mounted a lever 46 received by a stud 47 upstanding from the block. Said lever 46 has an arm 48 extending to the right to cooperate with the detector and second arm 49 extending to the left to actuate the loom controller. The latter mechanism comprises a pin 50 pivotally mounted as at 51 to arm 49 andextendinginto a slot 52 formed in an upstanding horn 53 formed integral with the stand 44. The horn has a vertical slot 54 therein extending across the slot 52 to receive a regularly reciprocating controller lever 55. For further description of the controller lever and the mechanism associated therewith reference may be had to Patent No. 1,030,748. It is sufficient for the purposes of the present description to state that whenever controller pin 50 is moved under level 55 to prevent the normal descent of the latter an indication of weft exhaustion is given to initiate weft transfer. A spring 516 surrounds pin 50 and is interposed between horn; 53. and an adjustable collar 57 on the pin 50 to hold the latter normally out of the path of the actuator. In order to position the controller pin I secure to the block 44 an arm 58 in the upper end of which is threaded av stop screw 59 which engages the arm 49.

The detecting mechanism for actuating the lever 46v against the action of spring 56 comprises a bed 60 supported on a stud 61 secured to and extending from stand 44. Guided in said bed for reciprocating movement is. a slide 62 retained by holding plates secured to the detector bed. As shown in Fi 6 a clip 64 depends from the slide 62 and has extending therethrough a stud 65 provided with a threaded head 66 which is received in the feeler bed. A compression spring 67 is interposed between the clip and the bed 60 to hold the slide 62 yieldingly in rear position. i

yarn engaging'portion; of the detector comprises a relatively broad fiat yarn impinging block 68 through which extends a yarn penetrating pin 69. Said pin has a shoulder 7 0, and is. effect as at 71 to. receive stop nuts 72. An actuating lever 7 3 is pivoted as at 74 to the slide 62 and is held normally and yieldingly 'in' raised position by compression spring 75 mounted on the slide. Said lever 73 is slotted as at 76 to receive and guide the forward end of the offset 71. The forward end of lever 73 may be pointed to enter the notched arm 48.

Vihen suffic ent yarn is present for con tinned weaving the pin 69 will penetrate into the yarn and the relative position ofthe parts car 'ied by the slide will remain unchanged so that as lever 73 moves forward it will not engage the arm 43 of the lever 46. At the time of exhaustion of weft, there will be insufficient yarn to receive the whole amount of the pin 69 which projects beyond the block 68 and said pin will be moved forwardly'with resoect to the slide, thus depressing the forward end of lever 73 to cause the controlling pin to pass under lever 55.

My invention more particularly relates to the device for rendering said detector capable of giving an indication of weft'exhaustfon when varying amounts of yarn remain in the active shuttle. It is desirable that a thinner layer of the fine yarn remain at the time of indication than is the case with the coarse yarn, any given number of picks of fine yarn presenting less bulk than a corre spond ng number of picks of coarser yarn. As exhaustion approaches the pin 69 will begin to undergo a relative motion with respect to the slide 62 and when this relative motion becomes suihcient the forward-end of the actuator 73 will be low enough to engage the arm 48. The vertical position of the forward end of said actuator 73 is therefore dependent upon the thickness of the layer of yarn remaining on the bobbin and the invention disclosed herein provides for moving the lever from one vertical posi tion to another, being in lowest position when the finest yarn is being woven and being in highest position when the coarsest yarn is being woven.

The setting as shown in the drawings is for coarse yarn, a comparatively slight depression of the actuator 73 resi-ilting in engagement with the lever 46'. VJhen a shuttle carrying coarse yarn passes out of action and a. shuttle carrying tine yarn comes into action the stud 32 on leve 31 will more into of the. cam sl-cts :36 thus n'iovine said lever 31- to a different angular ition to lower requiring the actuator lever to be depressed more than when coarse was active be: fore the controller pin will be actuated. A thinner layer of fine yarn will therefore re main at indication. The slot F2 in the horn 53 permits lever 46 to move vertically as set forth and the screw 59 serves to'stop the lever in all of its vertical positions.

From the foregoing it will be seen that I block 41. This lowers layer 46. thus lac ; pendent upon the active shuttle, said indication requiring a relatively large motion,

of the actuator 73 when fine yarn is being woven and a relatively small motion of said actuator when coarse yarn is being woven. It will be noted that the mechanism set forth herein is not connected directly with the yarn impinging or penetrating. members and the latter are therefore subjected to no more motion than attends their use in the ordinary type of detector. The device associated with the box rod as shown herein gives a positive motion and permits the units to be interchanged so that the shuttles may be used in any desired order and in any box.

Having thus described my invention it will be apparent that changes andmodifica' tions may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In aloom having a plurality of shifting shuttle boxes and shuttles any one of which may become active, a detector having a yarn impinging member and a yarn penetrating member, and means under control oi the active shuttle box to vary the adjustment of said detector requiring a greater relative movement of said members when indicating substantial Weft exhaustion of one character of yarn than when indicating substantial weft exhaustion of another character of yarn. i

2. In a loom having a plurality of shuttles any one of which may become active, a weft detector having a yarn impinging member and a yarn penetrating member, means to cifect a change in the operation of the loom upon a relative motion of said members, and means to require a greater relative motion between said members to effecta change when detecting on line yarn than when detecting on coarse yarn.

3. In a loom having a plurality of shuttles and shuttle boxes any one of which may be moved to active position, a detector having relatively movable yarn impinging and yarn penetrating members, means to effect a change in the operation of the loom upon relative movement of said members, a controller for said means to be actuated. by the detector, and means under control of the shuttle boxes to vary the position of the controller relatively to the detector, the extent of relative motion between said members before the detector is operatively related to said controller being dependent upon which shuttle box is in active position.

4. In a loom having a plurality of shuttles and shuttle boxes any one of which may become active, means to eflect a change in the operation of the loom, a detector having a pair of relatively movable members to control said means, and means to require said members to have varying degrees of relative motion before said detector is effective to control said means dependent upon which shuttle box is in active.position.

5. In a loom having. a plurality of shuttles and shuttle boxes any one of which may become active, a detector to cooperate with each shuttle when active, said detector having a pair of parts movable relatively to each other, a device operative by the detector to indicate weft exhaustion and movable from one position to another under control of the shuttle boxes, said device when in one position requiring a greater relative motion of the detectors to efiect indication than when said device is in another position.

6. In a loom having a plurality of shuttles and shuttle boxes any one of which may become active, a detector having a yarn impinging member and a yarn penetrating member movable with respect to said impinging member, means elfective under certain conditions to give an indication of weft exhaustion when said members undergo a predetermined amount of relative motion, said means under other conditions requiring a different relative motion between said members before indication of weft exhaustion is given.

7 In a weft detector for looms having a plurality of shuttle boxes, a yarn impinging member, a yarn penetrating member relatively movable with respect thereto, means to effect a change in the operation of the loom, and means under control of the shuttle boxes to vary the amount of relative motion between said yarn impinging and yarn penetrating members necessary for actuating the means to efiect a change in the operation of the loom.

8. In a loom, shitting shuttle boxes, a control block movable with said boxes, a weft detector to cooperate with any shuttle, means to render said detector more sensitive when detecting one character of yarn than when detecting another character of yarn, and positive connections between said block and said means.

9. In a loom, shifting shuttle boxes, av control block movable therewith, a plurality of units, a movable device to cooperate with said units depending upon the position of the shuttle boxes, connections between said units and said device to move the latter positively to assume different positions, a weft detector having a surface capable of assuming varying degrees of sensitiveness, and connections between said device and said detector to vary the degree of sensitiveness of said detector as said device moves.

10. In a loom, shifting shuttle boxes, a plw rality of control units rigid with respect to each other and the boxes and movable With the latter, each of said units having a portion contiguous with the control portions of the adjacent units, a device movable to different positions, positive connections between said device and the control portions of said units, and amadjustable Weft detector controlled as to its adjustment by the move ment of said device to its dilferent positions.

11. In a loom having a plurality of shuttles and shuttle boxes any one of Which may become active, a movable Weft detector to cooperate with each shuttle when active,

yarn contacting structure to engage the yarn forming part of the detector, loom control lin mechanism, movable to different positions in timed-relation With-the active shuttle box, the yarn contacting structure retaining the same settin girrespective of Which shuttle box is in active posit-ion, and means to establish connections between the yarn contacting structure and loom controlling mechanism upon exhaustion vof Weft in any shuttle. p

In testimony whereof I have hereunto affixed my signature.

lVALTER H. WAKEFIELD. 

